Troutnut.com Fly Fishing for Trout Home
User Password
or register.
Scientific name search:

> > S. interpunctatum

The Specimen

Stenacron interpunctatum (Light Cahill) Mayfly DunStenacron interpunctatum (Light Cahill) Mayfly Dun View 6 PicturesThis is a fairly small late-season female Stenacron dun.
Collected August 22, 2006 from the West Branch of Owego Creek in New York
Added to Troutnut.com by on August 23, 2006

The Discussion

Post Reply
TaxonAugust 24th, 2006, 12:24 am
Site Editor
Plano, TX

Posts: 1311		Looks to be Stenacron interpunctatum (Stenonema heterotarsale).
Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com
TroutnutAugust 24th, 2006, 8:29 am
Administrator
Bellevue, WA

Posts: 2592		Thanks. I guess that's sort of the default guess.

Do you know any reference to rule out the other species of Stenacron? I'll have to check my papers more carefully but I don't think I've found a good one yet. You're probably right just based on distribution and abundance, but I've collected such a wide range of Stenacron specimens (all listed under interpunctatum on this site) that it's hard to believe they're all the same species.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
TaxonAugust 24th, 2006, 12:26 pm
Site Editor
Plano, TX

Posts: 1311		Jason-

My guess is based on the striking similarity of your photo to the photo labeled "Stenonema heterotarsale, female dun" on Color Plate XI in Hatches II. The wing coloring, venation, and marking are about as close as I've ever seen.
Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com
WiflyfisherAugust 24th, 2006, 6:34 pm
Wisconsin

Posts: 623
My guess is based on the striking similarity of your photo to the photo labeled "Stenonema heterotarsale, female dun" on Color Plate XI in Hatches II. The wing coloring, venation, and marking are about as close as I've ever seen.


In the past I have caught those same mayflies on the *********** River in NW WI. and came to the same conclusion using photos in Hatches.
John S.
https://WiFlyFisher.com
TroutnutAugust 24th, 2006, 7:36 pm
Administrator
Bellevue, WA

Posts: 2592		My main concern with the identification is that the differences between different Stenacron species may only be discernible in the male spinner forceps or nymph mouth parts or something. I'll try to find a better reference to the genus and figure iout.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
TaxonAugust 24th, 2006, 8:45 pm
Site Editor
Plano, TX

Posts: 1311		Jason-

Good point. Let me know what you find.
Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com

Quick Reply

You have to be logged in to post on the forum. It's this easy:
Username:          Email:

Password:    Confirm Password:

I am at least 13 years old and agree to the rules.

Related Discussions

TitleRepliesLast Reply
Re: Insect photos on CatskillFlies website
In the Mayfly Genus Ephemerella by Jpsully		4May 24, 2008
by Softhackle
Re: Not Stenacron
In Male Maccaffertium modestum Mayfly Dun by GONZO		2Feb 6, 2012
by Brookyman
Re: cahills
In the Mayfly Genus Stenacron by LittleJ		8Dec 1, 2006
by Troutnut
Re: Lifestage
In Male Ephemera simulans Mayfly Dun by Taxon		1Jul 2, 2019
by Troutnut
Re: Interesting clinger species
In the Identify This! Board by CalebBoyle		7Mar 31, 2007
by GONZO
Re: from Brazil
In the Identify This! Board by Lufi		19Sep 3, 2010
by Lufi
Re: Short Strike Streamer Swipers
In General Discussion by Dryfly		14Jun 12, 2009
by Aaron7_8
Re: Spinner?
In Male Neoleptophlebia heteronea Mayfly Adult by Martinlf		1May 19, 2012
by Taxon
Re: Leucrocuta
In Male Leucrocuta hebe Mayfly Spinner by Patrick		1Aug 7, 2006
by Troutnut
Re: A variety pack
(1 more)

In the Identify This! Board by Shawnny3		11Jul 10, 2012
by Gutcutter
Most Recent Posts
Re: Boulder-hopping on the Middle Fork of the Snoqualmie
In Site Updates by Troutnut
Re: Fall ISO's - Au Sable
In General Discussion by Brian314 (Partsman replied)
Re: traditional streamers- still in use?
In General Discussion by Roguerat (Wbranch replied)
Re: The white winged curse!
In General Discussion by Partsman (Brian314 replied)
Re: Ephemerella nymph
In Ephemerella aurivillii Mayfly Nymph by Millcreek (Troutnut replied)
Re: Need advice on fly line.
In Gear Talk by Montanafish (Red_green_h replied)
Re: Fly Fishing Rookie
In Gear Talk by Tor (Red_green_h replied)
Re: Timpanoga hecuba
In the Identify This! Board by Leskorcala
Re: Exploring up the Skykomish
In Site Updates by Troutnut (Martinlf replied)
Re: mean one thing, write another?
In Male Onocosmoecus unicolor Caddisfly Adult by Creno